Synthesizer

Multi-timbral polyphonic audio synthesis for the web.

Abstractions for building synthesizers with javascript - built on top of the Web Audio API.

Features

• Built on top of web-audio API
• ADSR amplitude envelopes
• EQ filtering
• Oscillator wave types - sine, square, triangle, sawtooth

Usage

// initialise the library
SYNTH.init();

// create an array of note frequencies using the SYNTH.Scale helper

var notes = SYNTH.Scale.create('C', 2, 'major');

// create a patch
var retroPatch = new SYNTH.Patch({
    timbres: [{
        type: 'square',
        volume: 0.2,
        attack: 0.001,
        release: 0.001,
        filters: [{
            type: 'highshelf',
            frequency: 10000,
            gain: -20
        }]
    }]
});

// create a synthesizer
var instrument = new SYNTH.Instrument({
    notes: notes,
    patches: [retroPatch]
});

// play/pause each 'trigger' in the instrument
instrument.triggers.forEach(function (trigger, index) {
    setTimeout(function () {
        trigger.play();
    }, index * 100);

    setTimeout(function () {
        trigger.pause();
    }, 100 + (index * 100));
});

Building

download:

git clone git@github.com:JasonStorey/synthesizer.git

enter the directory, and install dependencies:

cd synthesizer && npm install

build:

npm run build

run the tests:

npm test